The number of times the C language reads characters in notepad.

The number of times the C language reads characters in notepad.

Program instructions:
This program can calculate the number of times that a file named 1.txt appears.
However, you can only query single English letters and punctuation marks. Chinese characters are not supported.
Put a 1.txt file in the exeroot directory generated by this program,
You can query the number of times that the token appears in the 1.txt notepad.
By nebula

The test text is as follows:

The source code is as follows:

# Include <stdio. h> # include <windows. h> # include <string. h> # include <conio. h> int main () {FILE * fp; double I = 0, j = 0; char a, B;/* program description and interface settings, no impact on the program after deletion * // **********************/system ("color" ); printf ("\ n \ t \ tThis program can calculate the number of occurrences of/in a file named 1.txt: \ n "); printf ("\ n \ t this program only supports query of single English letters and punctuation marks, Chinese characters are not supported. \ N "); printf (" \ n \ t this program by Nebula, if you have any questions, please contact xingyun26845@gmail.com! \ N "); printf (" press any key to continue! \ N "); getch (); /* accept a single character ************//* to query the character */printf ("Enter the character to query: \ n "); scanf (" % c ", & B ); /* Statistics/number of times a file appears *********** /if (fp = fopen ("1.txt ", "r") = NULL) rewind (fp); while (! Feof (fp) {fscanf (fp, "% c", & a);/* read the characters in the file */if (a = '/') j ++;/* One count per read */} fclose (fp);/* close and save the file. */Printf ("\ n \ t/% appears in the file. 0f times \ n ", j ); /************************* // * count the number of times query characters appear in the file * // ****************************/if (fp = fopen ("1.txt ", "r") = NULL) rewind (fp);/* move the cursor to the beginning of the file */while (! Feof (fp) {fscanf (fp, "% c", & a); if (a = B) I ++;} fclose (fp ); *****************//******* */printf ("\ n \ tcc' appears in 1.txt. 0f times \ n ", B, I); printf (" \ t query character % c Probability: % f % \ n ", B, 100 * (I/j); printf ("press any key to exit the program! \ N "); getch (); return 0 ;}

Running result:

C language problems: Read the body from a text file and count the number of occurrences of each number and other characters

# Include "stdio. h"
# Include "conio. h"
# Include "math. h"
# Include "string. h"
Main ()

{Char a [] = "abcd hgh s1 &", ch;
Int I = 0, j = 0, k = 0, l = 0;
FILE * fp;
Fp = fopen ("d: \ liangnv.txt", "w ");
Fputs (a, fp );

Fclose (fp );
Fp = fopen ("d: \ liangnv.txt", "r ");
Ch = fgetc (fp );
While (ch! = EOF)
{If (ch> = 'A' & ch <= 'Z') I ++;
Else if (ch> = 'A' & ch <= 'Z') j ++;
Else if (ch> = '1' & ch <= '9') k ++;
Else l ++;

Ch = fgetc (fp );}
Fclose (fp );
Printf ("lowercase letter % d \ n", I );
Printf ("uppercase letter % d \ n", j );
Printf ("number \ n % d \ n", k );
Printf ("character % d \ n", l );
Getch ();
} Minute

Read a txt file in C language and calculate the number and location of each character in the file

When a node is not input, the node writes data to the file and counts the index of the linked list. The number of times of occurrence and location are unknown, make a global variable record or write it to the linked list. You can try this.